Prevention of iron and steel slugs entering slot machines



July 25, G P U PREVENTION OF IRON AND STEEL SLUGS ENTERING SLOT MACHINESFiled Sept. 9, 1932 Patented July 25, 1933 Ul'i'E STATES PATENT OFFICEGUST POULAS, OI GLEVELAND, OHIO, ASSIGNOR 0F FORTY PER CENT TO THEODOREBIBICOS, OF CLEVELAND, OHIO PREVENTION OF IRON AND STEEL SLU'GS ENTERINGSLOT MACHINES Application filed September 9, 1932. Serial No. 632,345.

This invention relates to fraud preventive devices to prevent theinsertion of iron, steel, or other magnetic slugs into slot machines.

An object of the invention is to provide an improved, simple andeffective device for this purpose, characterized by the use of a magnetfixed with one of its poles beside the coin slot, and a movable orpivoted magnetic lock member or stop which is positioned between thepoles and which is normally held by the attraction of the magnet out ofline with the slot, but which upon the insert-ion of a magnetic slugwill swing out across the slot and stop the passage of the slug, thepassage of a non-magnetic coin being nevertheless permitted.

In the accompanying drawing Fig. l is a top view of a box made ofnon-magnetic material which contains the mechanism. Fig. 2 is a sideview of Fig. 1 with parts in section and shows the position of the stopmember when a coin is inserted. Fig. 3 is a view similar to Fig. 2showing a magnetic slug stopped by said member. Fig. 4 is a sideelevation of the stop member and the frame for supporting it. Fig. 5 isa section on the line 55 of Fig. 2 looking down. Fig. 6 is a perspectiveview of the magnet.

The box 1 is made of non-magnetic material of a proper size and shapetobe inserted in any slot machine and to contain the parts to bedescribed. This has the coin slot 2, a coin or slug being indicated at3. A magnet 4 is fastened in fixed position to the top of the box, by abolt 8 through holes 13 and lock nuts 14, one of its poles being locateddirectly beside the slot 2. Located between the poles of the magnet is astop member 5, comprising a plate of magnetic material pivoted as at 6between pivots 11 and 12 supported by a frame 7 fixed to the magnet. Theupper edge of this lock member has a groove 10, and the member isperforated as at 9 to increase the action of the magnetic flux betweenthe poles.

Normally the attraction of the magnet will hold the stop member 5 inline between its poles and out of line with the slot, and when a coin isinserted it will slip past the stop and into the machine, as shown inFig. 2. But upon the insertion of a magnetic slug the change ofdirection in the lines of force will cause the stop member to swingoutwardly across the slot in position to engage and stop the slug, asshown in Fig. 3. As the slug cannot be inserted it must be removed.

The magnet is shown as a horse-shoe magnet but obviously other formscould be used, and various other changes may be made in the structure,within the scope of the invention.

I claim:

1. The combination with a casing having a coin'slot, of a magnet fixedbeside the slot, and a magnetic stop member pivoted between the poles ofthe magnet and adjacent the slot and normally held by the magnet out ofline with the slot and adapted to swing across said slot upon theinsertion of a magnetic slug therein.

2. The combination stated in claim 1, the stop member having a groove inits edge in which the slug will be engaged.

3. The combination stated in claim 1, the stop member comprising a plateof magnetic material with holes through the same.

4. The combination with a casing having a coin slot, of a magnet fixedto the casing,

and having an upper pole beside the coin slot and a lower pole below thesame, and a magnetic stop member pivoted to swing between the poles andnormally held by the magnet out of line with the slot and arranged toswing into line with said slot upon the insertion of a magnetic slugbeside the upper pole.

GUST POULAS.

